Electric Circuits Answers

Explain transformers.

If the work function of a metal is 3.6eV where it is connected as an emitter in a photoelectric experiment and light with wavelength 732nm strikes metal. How to find if there is minimum potential difference that can be applied to ensure that there is no current in the circuit due to the movement of photoelectrons to the collector?

1. A test charge of +2µC is located 4m to the east of a -5µC charge.(k= 9xNm2/C2) A) Find the electric force felt by the test charge. B) Find the electric field at that location.

2. Calculate the electric field felt by a positive test charge located half way between a charge of +2C and a charge of -2C, that are 3m apart

A metal is connected as the emitter in a photoelectric effect experiment. Light with wavelength 831nm strikes the metal. Is there a minimum potential difference that can be applied to ensure that there is no current in the circuit due to the movement of photoelectrons to the collector?

A metal is connected as the emitter in a photoelectric effect experiment. Light with wavelength 741 strikes the metal. Is there a minimum potential difference that can be applied to ensure that there is no current in the circuit due to the movement of photoelectrons to the collector?

The capacitors have values C1= 2.0 uf and C2= 4.0 uF, C3=5.0 uF C4= 7.0 uF and the potential difference across the battery is 9.0 V. Assume that the capacitors are connected in series?

How do I find the magnitude of acceleration of an electron when I only know E?

An electrician experienced a mild shock when he accidentally touched a live wire carrying 1.5 amperes of current within a duration of 1.3 seconds. How many electrons constitute the given current that went through the body of the electrician?

Assume that there is three resistance (r1, r2, r3) and two batteries emfs are given as (five positive numbers). Using Kirchhoff’s node and loop law, set up a system of independent equations that would allow you to solve for all the currents for circuits. Note that there will be more than three unknown currents.

do not solve the system of equations , just list the equations. Make sure that all the three equations are independent of eachother and that there are as many equations as there are unknown.

1. A parallel circuit contains four 1.5 volt batteries and three resistances of 5.0, 2.5 and 4.0 - What is the total emf?
2. What is the total resistance of this circuit?
3. What current does the parallel circuit above draw?

Thank you